Aoi Yuuki (Madoka's VA) really likes Kyoko and she claimed that Kyoko is her wife. You can hear her confession in the Magical Girls Tea Party bonus CD.

In the commentary for Episode 5 Aoi Yuki declares her love for Kyoko and desires to marry her. Ai Nonaka questions her choice and informs her all she ever does is eat. Aoi Yuki is ok with this and declares she would just adjust.

Aoi Yuuki goes even more gaga for Kyoko in the audio commentaries for Episode 7: "The one I love, it's Kyoko-tan." "Kyoko-tan is the absolute best!" "it's like she isn't trying to be cool, but she's still REALLY cool."

In the "C81 Aniplex Madoka Special Talk CD", not even two minutes has passed and Aoi Yuki's already fangirling over Kyoko-tan~